Molding device



June 30, 1925. 1,543,955- d A. c. sLoAN MOLDING DEVICE Filed June 24, 1920 mn/ENTOR.r

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Patented June 30, 1925.

UNITED STATES PATENT FFICE,

Application filed `Tune 24, 1920.

To all whom it may concern.:

Be it known that I, ALFRED C. SLoAN, Va citizen of the United States, residing at Philadelphia, in the county of Philadelpliia and State of Pennsylvania, haveinvented certain new and useful Improvements in Molding Devices, of which the following is a specification.

My invention relates to a novel molding. device, primarily adapted for use by dentists to produce in plaster or any other suitable plastic material the positive mold from a wax impression or negative mold taken from the subjects mouth, the device comprising mainly a platform or i'i'iolding-board adapted to be vibrated or reciprocated, and which consists of a combined container and support for the plastic molding material and the wax impression-mold or molds into which said-plastic material is adapted to be formed to produce thepositive mold.

Furthermore, my invention resides in providing a vibratory member or moldingboard of this character yieldingly carried by a support, the molding-board on its upper surface being provided with combined means .for containing the plastic molding material and forming a supporting` face for the wax impression-molds, the under Surface of the board being provided with means to co-operate with means carried by the support to vibrate said molding, the device be ing operated either manually or by power.

A still further object of my invention is to provide a molding device of this character which comprises a molding-board provided with a resilient support, and means in operative connection with said moldingboard to reciprocate the molding-board, said means to be operated either manually or by power.

lVith these and other objects in view, my invention .comprises additional novel details of construction and operation clearly brought out in the following description, when read in conjunction with the accompanying drawings, in which- Fig." l represents a -front elevational view showing an embodiment of my invention;

Fig. 2 represents a vertical sectional view taken on the line 2 2 of Fig. l, illustrating several of the dental molding devices or impression-molds secured to the vibratory molding-board Serial No. 391,414.

F 3 represents a fragmentary vertical sectional view taken on the line 3 3 of Fig. 1, showing the tray for containing the molding lcompound; and

F 1g, 4 represents a top plan rview of the molding-board.

Referring to the drawings, and more e-specially to Figs. l and 2, I have shown my device secured to the edge of a table by a clamping means, it being readily understood that the device may be mounted or supported in any suitable manner.

Heretofore the method of casting the positive fmold of a mouth from the wax impression or negative mold has been carried out by hand operation, which entailed considerable labor upon the part of the operator in jarring the impression-mold to set the plastic material of the positive mold therein, and which operation has been found to be most ineiicient in that the movement of the hand in jarring causes an irregular distribution and varying density in the body ot' the plastic material for the positive mold.

To overcome the above described inefficiency of hand operation, I have provided a novel device mechanically operated to impart constant and regular vibrations to the vimpression-mold, thereby effecting a very eliicient method of molding the positive mold from the impression-mold.

In carrying out the principle of my invention, I have shown -an embodiment thereof in the drawings in which l designates a platform or molding-board, a portion of the upper face of which is cut out to provide a tray 2 for containing the plastic material 3 from which the positive mold is formed, while the remaining upper portion of the board forms a supporting surface t'for the wax impression-molds 5 contained in the mouth trays 6, said t ays being held to the supporting surface I by the wax 7, which wax completely encircles the outer walls of the tray 6 and the impression-mold 5. and closes the open end of the impression-mold to confine the plastic material in the impression-mold when forming the positive mold 8.

To the underface of the molding-board is secured a. socket 9, in which is securely fastened the upper portion of a resilient coilspring 10, while the lower end of said spring is secured in a socket Il integral with a support or clamp 12 provided with a threaded opening, in which engages the threaded bolt 13 formed with a head 14 to frictionally engage the underface of the table, and to rigidly hold theclamp to the latter. It Will readily be seen that with this construction, the inoldingeboard is. yieldingly carried by the supporting clamp 12.

15-15 designates vertically extendingarins integral with the clamp 12, the upper portion of these arms forming journal-bearings for the shaftY 16,.provided on one end thereof with a crank. 2O for` revolving the shaft. 17e-173 designates discs securedto the shaft 16,V the peripheralfaces of these discs being mutilated as at 18, to engagel the fingers 19 secured to the underface of the board, to impart-vibrations to theboard when the discs are revolved.

In the operation of, my molding device, the operator securely fastensthe mouth-tray containing the impression-moldof Wax on the surface Ll of the moldings-board 41 through the medium of the Wax 7, or any other suitable means, theivax serving `to close'theopen end of the impression-mold.` The plastic material is tlien\placed..in.the tray portion of the molding-board. The operator then manipulates theV crank 20 -to revolve the lshaft .16, thus revolving` themutilated discs 17 vwhich `are in` engagement with. the fingers secured to.` the underface of theV inoldingvboard imparting .vibrations to said moldingboard:due to the. manner in which, the molding-board isyieldingly supported from .the stationary. element orv clamp 12. Due: tothe vibration. of. the moldingboard,

the.plasticmaterial supportedand contained thereon is agitatedto bringV it to a proper. consistency, `With .all f the air removed from the compound, and While thisoperation still continues the operator with a-scalpel applies said plastic material Ato the Wax. negative,y or

iinpression-inold 5. tol form theAV positivev moldS. VIt will readilyj be seenvrthat-.With

the continuous` and simultaneous agitation.l of thek plastic material While in theVV looseV form and .when depositedin the, impressiom mold., an even consistency ofthe material is.l

effected. at all times during4 the molding operation, Which is veryessential 'inproducingk the' positiveinoldor negativeinold carried in tlieinouth-tray 6. l

After the plaster of the.positiveinoldB solidities v to a`v proper vhardness ordensity, the'ivax ofthenegativemold 5 is separated. therefrom, leaving-the positive mold/ofthe subjects mouth. positive mold-y ofthe mouth is one ofther several steps necessary in thev makingof the vulcanite denture. It Willof course` be. understood that with a slight. variation inA the inode of procedure, the; positive mold produced by my method. may readilyV be.

utilized to produce a metallic denture.

Having thus described my invention, what The production. of the.

slowly `introducing a second substancein` v said mold, xand While introducing saidsub stance imparting uniform vibrator'y move-ii mentto said mold.

3'. 4The method .of molding plastic mater rial, which consists in introducingthe niaf terial'into a mold in sinallquantities, and

simultaneously impartingY vibratory movement to said mold to feflect uniform vdis tribution of said material in Saidfmold.

4. A vibratory molding-,device for dental use, which comprisesin combination a. molding-board and a support therefor, said y molding-board being. formed With a` con-` taining. tray adapted to contain plastic molding material and a supporting, face `upon which is adapted to be held dental.

molding devices, said moldingfboard being4 yieldingly carried by said support, and

means carried byV saidsuppcrt co-operating with means carried by said inoldingboard to lvibrate the latter. y

5. A i vibratory molding. device' for dental` use, which coin-prises incombination a mold ing-.board anda supporttherefor, said 'molding-board, being. forijnedf withl af containing trayadaptedto contain plastic molding inaterial Vand supporting. faceuponwhich, is

adapted to `be held dentallinoldilng. devices,`

bysaid support,means carriedby saidlsupport co-operatingWithuneans carried by said.y molding-board to f vibrate the.latter,

and means forrigidly;securing;said support Vto a stationary element. t

6. A i vibratory molding, device .fordental use, which' comprises inacombination a moldingfboard and i a support therefor, said molding-,board von' its upper .face .being prosupporting face, a spring, one end ofsaid vided Awith a .combined container. and.` mold spring.` being secu-red.V to the underface of said molding-Aboard, vWhile the other. end `of w `said springis seein-edito saidzsupporadef pending fingers secured 4tosthe:underface-.of i `said molding-board, aiotatable` shaft jourL i nailed in said support, discssecuredto said shaft, saidk `discs being providedA with sei rated. peripherall faces/said. depending4 lingers in engagement .with .the peripheral faces of said discs, and ineansrfor rotating.`

said shaft.

7. A .vibratory moldingdevice' for 4dental use, Which comprises in combination a molding-board and a supporttherefor, said molding-board on its upper face being pro vided with a combined container and mold supporting face, a spring, one end of saitl spring being secured to the underface of said molding-board, While the other end oi said spring is secured to said support, depending fingers secured to the under-face of said molding-board, a rotatable shaft journalled in said support, discs secured to said shaft, said discs being provided with ser rated peripheral faces, said depending ingers in engagement With the peripheral faces of said discs, and means for manually rotating said shaft.

8. A vibratory molding device for dental use, which comprises in combination a molding-board and a support therefor, said molding-board on its upper face being provided With a combined container and mold supporting face, a spring, one end of said spring being secured to the underface of said molding-board, While the other end of said spring is secured to said support, depending iingers secured to the nnderface of said molding-board, a rotatable shaft journalled in said support, discs secured to said shaft, said discs being provided with serrated peripheral faces, said depending fingers in engagement` With the peripheral faces of said discs, means for manually rotating said shaft, said support comprising a clamp, and means for rigidly holding said clamp to a stationary element.

9. Molding apparatus, comprising a mold, a yielding support for said mold, and means for vibrating said mold While yieldingly supported.

l0. Molding apparatus, comprising a mold, a spring for supporting said mold for universal movement, and a rapping device for vibrating said mold.

1l. Molding apparatus, comprising a mold table, a helical spring for supporting said table, a pair of toothed members mounted for engagement with said table, and means for rotating said members.

12. Molding apparatus, comprising a mold table, a helical spring disposed beneath said table and serving as a support therefor, a plurality of toothed members engaging the underside of said table in spaced relation to one another and to said spring, and means for rotating said members.

In testimony whereof, l have a'tiixed my signature.

ALFRED C. SLOAN. litnesses A. ALBERT BULMER, 'lHnoDoRn RosnMANN. 

